Home / 21,078.76-29,091.60-12,126.08

Finding the Fourth Proportional to 21,078.76, 29,091.60 and 12,126.08

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Solution

The fourth proportional to 21,078.76, 29,091.60 and 12,126.08 is: 16,735.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.76 : 29,091.60 = 12,126.08 : x
  2. Step 2: Convert to fraction form
    21,078.76/29,091.60 = 12,126.08/x
  3. Step 3: Cross multiply
    21,078.76x = 29,091.60 × 12,126.08
  4. Step 4: Simplify right side
    21,078.76x = 352,767,068.93
  5. Step 5: Solve for x
    x = 352,767,068.93/21,078.76
  6. Step 6: Final answer
    x = 16,735.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.